How do you brainwash someone? Hypnotism! That's one way, I suppose. If Anthony Burgess is to be believed, taping someone's eyes open and just showing them a whole bunch of violent acts will also do (but that seems sort of specific). There are also surely some hard-science techniques that are too complex to go into in a simple news story. Announcing dozens of bands for your experimental music festival? That's probably not going to get the job done.